<!DOCTYPE html>
<html lang="zh-cn">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Style Import Limit</title>
    <style>
        @import url(sheet2.css) all;
        @import url(buleworld.css) screen;
        @import url(zany.css) projection,
        print;
    </style>
    <style>
        @import url(http://example.org/libary/layout.css);
        @import url(basic-text.css);
        @import url(printer.css) print;
        body {
            color: red;
        }

        h1 {
            color: blue;
        }
    </style>
</head>
<body>

</body>
</html>